names = ["陈强", "余明华", "王俊人", "赵雪峰"]
print(names)
print(names[2])
names.insert(1, "陈启明")
print(names)
name = names.pop()
print(names)
print(name)
print(names[-1])
names.remove("王俊人")
print(names)
names.append("余图勇")
print(names)
chars = ["abcd", "hhrc", "tasf", "csdfd", "dafd", "ggasd", "zsdfsaf"]
print(sorted(chars))
print(chars)
chars.sort(reverse=True)
print(chars)
print(len(chars))